As "Doctor Who" season 8 continues filming with its relatively new cast, some popular alums are getting quite the support for their own spin-off series.

Whovians know that it's been a longstanding desire to see the return of Jack Harkness (played by John Barrowman) after "Torchwood," and last year Barrowman even supported the idea of a Jack and River Song spin off.

"I'd like to see the two of them prior to their lives crossing in some time realm where they actually meet up without the Doctors or anything like that and they are rogue heroes. Kind of like what 'Star Trek' did in the very beginning, going around and saving civilizations without trying to get too involved, but they always get involved," said Barrowman to TVAddict last year.

"I think there would be a lot of standing off between the two of them to begin with, because they are two very, very strong characters. Very flirtatious! There would be a lot of innuendo going on. I think they would not do anything with each other for a long time because it would be too predictable. They have to be confined in a spaceship for a little while."

Currently, the jury is still out on whether the rumors of River Song returning to "Doctor Who" during season 8 will occur, but it feels less and less likely given the recent introduction of new companion Danny Pink.

But what do "Doctor Who" fans say to a potential spin off?

A Doctor Who spin off everyone wants: https://t.co/N5xtXoAox4 pic.twitter.com/pxCXWYvX3H

— Oni Hartstein (@onezumi) February 19, 2014

What do you think? Would you rather see these characters make guest star appearances as "Doctor Who" season 8 continues, or have their own spin off series?